Home / 8,278.20-12,410.10-4,987.80

Finding the Fourth Proportional to 8,278.20, 12,410.10 and 4,987.80

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Solution

The fourth proportional to 8,278.20, 12,410.10 and 4,987.80 is: 7,477.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.20 : 12,410.10 = 4,987.80 : x
  2. Step 2: Convert to fraction form
    8,278.20/12,410.10 = 4,987.80/x
  3. Step 3: Cross multiply
    8,278.20x = 12,410.10 × 4,987.80
  4. Step 4: Simplify right side
    8,278.20x = 61,899,096.78
  5. Step 5: Solve for x
    x = 61,899,096.78/8,278.20
  6. Step 6: Final answer
    x = 7,477.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.